File Deletion via Shred
editFile Deletion via Shred
editIdentifies file deletions using the shred command. Malware or other files
dropped or created on a system by an adversary may leave traces behind as to
what was done within a network and how. Adversaries may remove these files over
the course of an intrusion to keep their footprint low or remove them at the
end as part of the post-intrusion cleanup process.
Rule type: query
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Linux
- Threat Detection
- Defense Evasion
Version: 7 (version history)
Added (Elastic Stack release): 7.8.0
Last modified (Elastic Stack release): 7.12.0
Rule authors: Elastic
Rule license: Elastic License v2
Rule query
editevent.category:process and event.type:(start or process_started) and
process.name:shred and process.args:("-u" or "--remove" or "-z" or "--
zero")
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Indicator Removal on Host
- ID: T1070
- Reference URL: https://attack.mitre.org/techniques/T1070/
Rule version history
edit- Version 7 (7.12.0 release)
-
- Formatting only
- Version 6 (7.11.2 release)
-
- Formatting only
- Version 5 (7.11.0 release)
-
- Formatting only
- Version 4 (7.10.0 release)
-
- Formatting only
- Version 3 (7.9.1 release)
-
- Formatting only
- Version 2 (7.9.0 release)
-
-
Updated query, changed from:
event.action:(executed or process_started) and process.name:shred and process.args:("-u" or "--remove" or "-z" or "--zero")
-